编写c语言程序,,输入三角形三边a,b,c,判断a,b,c,能否构成三角形,答:int main(){ int a,b,c;printf("please input 3 numbers as a,b,c:\n");scanf("%d,%d,%d",&a,&b,&c);if(a+b<=c) printf("can't\n");else if(a+c<=b) printf("can't\n");else if(b+c<=a) printf("can't\n");else if(a==b){ if(b==c) printf("等边\n...